If you’re between sizes in the Jil Sander Wool Julie Shirt, the safest choice is usually to size up for an easier, more polished drape—especially since wool shirting can feel less forgiving than cotton once it’s buttoned and layered. Sizing up also helps avoid pulling at the bust, gaping at the buttons, and tightness across the shoulders when you move.
That said, the “right” direction depends on how you plan to wear it. If you want a crisp, tailored look under a blazer or prefer a neater silhouette, choose the smaller size—provided your shoulders and bust fit cleanly without strain. If you want it to read more relaxed (or you’ll wear it over a tee or thin knit), choose the larger size for extra room through the chest and arms.
Two fit checkpoints make the decision easier:
Wool can also be more sensitive to care. If you expect any slight change from steaming, pressing, or dry cleaning, a bit of extra ease (the larger size) tends to keep the shirt looking intentional rather than tight.
For a more detailed breakdown and fit guidance, visit the full guide here: https://havel.shop/blog/what-size-should-i-choose-in-the-jil-sander-wool-julie-shirt-if-i-m-between-sizes/.
Wool may relax slightly with wear, but it won’t “stretch out” like jersey. If it feels snug at the shoulders or buttons when new, choosing the larger size usually delivers a better long-term fit.
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